Duel Original · Single-roll
Pick a win chance. The multiplier is the exact inverse of it.
How to play
Drag the slider to set your win chance — the multiplier updates live as the inverse.
Choose roll-over or roll-under. The two are symmetric; neither is better.
Set your wager and roll. The result is a number between 0.00 and 100.00.
Check any roll afterwards from the bet history — everything needed to prove it is there.
Playing it well
A 98% chance and a 2% chance are worth exactly the same to you in the long run — one just wins small and often, the other rarely and big. The slider changes how bumpy the ride is, not how it ends. Pick the one you can sit through.
Doubling up after every loss does not start working just because the game is fair. All it does is hide a lot of small wins in front of one enormous loss — and that loss arrives when you run into the table limit or the bottom of your balance.
The payout is one division, so if anything ever changes about Duel’s pricing, this is where you’d spot it first. Set 49.5% and look at the multiplier — that’s the whole test.
Quick check. Set the slider to 49.50% and read the multiplier. 2.0202× is a zero edge. 2.0182× is the 0.1% edge that appears explicitly in Duel’s Crash formula. 2.0000× is a standard 1% edge.
Fair odds are not a winning system. Taking the casino’s advantage away does not hand you one. The best any of these games does is break even over time, and a bad night can still take everything you brought. Decide what you are willing to lose before you open the game, not halfway through it.
What it pays
The numbers below are what actually lands in your balance, using a $10 bet as the example.
Whatever your chance of winning, the payout is the mirror image of it. Win one time in four and you get four times your bet. Win one time in a hundred and you get a hundred times.
Nothing is shaved off along the way, which is why a 25% chance pays a clean 4× and not 3.96×.
| Your win chance | Pays | A $10 bet returns |
|---|---|---|
| 50% | 2× | $20 |
| 25% | 4× | $40 |
| 10% | 10× | $100 |
| 2% | 50× | $500 |
| 0.5% | 200× | $2,000 |
FAQ
Duel’s provably-fair article for Dice documents the result derivation but does not publish an RTP or house edge figure. The check is empirical: set 49.50% win chance and read the multiplier. 2.0202× means the payout is the exact inverse of the probability and the edge is zero.
Because there are 10,001 possible results rather than 10,000 — every hundredth from 0.00 all the way up to 100.00 inclusive. It is a small detail, and it does not change your odds.
That is ⌊2³² ÷ 10001⌋ × 10001 exactly. Values above it would make the low outcomes marginally more likely, so they are discarded rather than folded in.
Your own client seed is mixed into every result, so once Duel reveals the server seed you can recalculate any round offline.
Duel’s Dice documentationKeep reading
A rising curve, a cash-out button, and the only Original that keeps a cut.
Roulette with the zero-pocket advantage taken out of the payouts.
Hide the bombs, open the safe tiles, cash out before your luck runs out.
0% house edge
Duel runs a deposit match plus rakeback for new accounts. Terms, size and wagering change often — confirm the current numbers in your account before you deposit.
18+. Wagering requirements apply. Terms set by the operator and subject to change.